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43 problems total

Array (1905)Sorting (440)Depth First Search (316)Database (301)Breadth First Search (241)Tree (240)Stack (172)Graph Theory (169)Linked List (81)Monotonic Stack (67)Queue (50)Recursion (48)Shortest Path (33)

All Topics(4301)Database(305)Networking(0)Object Oriented Design(31)Programming Languages(5)System Design(0)Algorithms(3944)

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Title	Difficulty	Videos	Companies
Unique BSTs 2 - Generate	medium	-	adobe amazon apple
Unique BSTs 1 - Count	medium	-	adobe amazon apple
Validate Binary Search Tree	medium		adobe amazon apple
Recover Binary Search Tree	medium	-	amazon bloomberg facebook
Convert Sorted Array to height-balanced Binary Search Tree	easy		airbnb amazon apple
Convert Sorted List into a height-balanced Binary search Tree	medium	-	amazon bloomberg facebook
Binary Search Tree BST Inorder Iterator	medium	-	alibaba amazon apple
Kth Smallest Element in a BST	medium		affirm amazon apple
Lowest Common Ancestor of a Binary Search Tree	medium		adobe amazon bloomberg
Verify Preorder Sequence in Binary Search Tree	medium	-	mathworks uber zenefits
Closest Binary Search Tree Value	easy	-	amazon bloomberg facebook
Closest Binary Search Tree Value II	hard	-	amazon facebook forusall
Inorder Successor in Binary Search Tree	medium	-	amazon bloomberg citadel
Largest Binary Search Tree BST Subtree	medium	-	amazon apple facebook
Convert Binary Search Tree to Sorted Doubly Linked List	medium	-	amazon bloomberg databricks
Serialize and Deserialize Binary Search Tree BST	medium	-	amazon bytedance ebay
Delete in a Binary Search Tree	medium	-	amazon apple bloomberg
Find Mode in Binary Search Tree	easy	-	amazon google
Inorder Successor in Binary Search Tree Using Parent link	medium	-	bloomberg google microsoft
Minimum Absolute Difference in BST	easy	-	amazon apple google
Convert BST to Greater Sum Tree	medium		amazon apple microsoft
Two Sum 4 - Input is Binary Search Tree	easy	-	amazon facebook google
Trim a Binary Search Tree BST	medium	-	adobe amazon apple
Search in a Binary Search Tree	easy	-	adobe apple google
Insert into a Binary Search Tree	medium	-	amazon atlassian facebook
Kth Largest Element in a Stream	easy		adobe amazon apple
Split BST	medium	-	amazon coupang facebook
Increasing Order Search Tree	easy	-
Range Sum of BST	easy	-	amazon apple facebook
Construct Binary Search Tree BST from Preorder Traversal	medium	-	amazon facebook microsoft
Intersection of Three Sorted Arrays	easy	-	facebook tripadvisor
Two Sum BSTs	medium	-	amazon
Find the Team Size	easy	-	amazon
All Elements in Two Binary Search Trees	medium	-	amazon facebook oracle
Maximum Sum BST in Binary Tree	hard	-	amazon
Balance a Binary Search Tree	medium		amazon
Number of Ways to Reorder Array to Get Same BST	hard	-
Min Cost to Connect All Points	medium	-
Binary Search Tree Iterator II	medium	-
Merge Triplets to Form Target Triplet	medium	-
Depth of BST Given Insertion Order	medium	-
Split Message Based on Limit Problem	hard	-	amazon uber
Closest Nodes Queries in a Binary Search Tree	medium	-